
let fn = function fns() { }
Function.prototype.a = 1
Object.prototype.b = 2
const F = new fn()
console.log(fn.a, fn.b, F.a, F.b)


// F.__proto__  => fn.prototype => fn.prototype.__proto__ => Object.prototype


console.log(fn.__proto__==Function.prototype)


F.__proto__ == fn.prototype
fn.prototype.__proto__ == Object.prototype